Procedure employing a diode-pumped laser for controllably textur

Details Procedure employing a diode-pumped laser for controllably textur Procedure employing a diode-pumped laser for controllably textur

1998-01-08

2000-01-11

Padgett, Marianne

Coating processes

Direct application of electrical, magnetic, wave, or...

Pretreatment of substrate or post-treatment of coated substrate

427556, 427553, 427129, 427130, 21912173, 21912176, 360135, B05D 306, B05D 512, G11B 528

Patent

active

060133368

ABSTRACT:
A process for creating a "distant bump array" surface texture in a magnetic recording disk for reducing stiction and the disk so textured. The texturing process uses a tightly focused diode-pumped Nd:YLF or Nd:YVO.sub.4 or other solid-state laser that is pulsed with a 0.3-90 nanosecond pulse train to produce a plurality of distantly-spaced bumps in the disk surface. The bump creation process is highly controllable, permitting repeated creation of a preselected bump profile such as a smooth dimple or one with a central protrusion useful for low stiction without close spacing or elevated "roughness". Some bump profiles permit texturing of the data-storage region of the disk surface for low stiction without materially affecting magnetic data storage density.

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